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The influence of hypothermia on transfusion requirement in patients who received clopidogrel in proximity to off-pump coronary bypass surgery

Authors
 Bo Ra Lee  ;  Jong Wook Song  ;  Young Lan Kwak  ;  Kyoung Jong Yoo  ;  Jae Kwang Shim 
Citation
 Yonsei Medical Journal, Vol.55(1) : 224-231, 2014 
Journal Title
 Yonsei Medical Journal 
ISSN
 0513-5796 
Issue Date
2014
Abstract
PURPOSE: Hypothermia adversely affects the coagulation that could be of clinical significance in patients receiving clopidogrel. We evaluated the influence of hypothermia on transfusion requirements in patients undergoing isolated off-pump coronary artery bypass surgery (OPCAB) who continued clopidogrel use within 5 days of surgery. MATERIALS AND METHODS: Protocol-based, prospectively entered data of 369 patients were retrospectively reviewed. The time-weighted average of intraoperative temperatures and the temperature upon ICU admission (TWA-temp) was assessed. Patients were divided into normothermia (≥36°C, n=224) and hypothermia (<36°C, n=145) group. The transfusion requirement for perioperative blood loss was assessed and compared. RESULTS: Patients with hypothermia were older and had lower body surface area (BSA) than patients with normothermia. Age and BSA adjusted transfusion requirement was significantly larger in the hypothermia group [patients requiring transfusion: 64% versus 48%, p=0.003; number of units: 0 (0-2) units versus 2 (0-3) units, p=0.002]. In multivariate analysis of predictors of perioperative multiple transfusion requirements, hypothermia was identified as an independent risk factor along with age, female gender, BSA, chronic kidney disease, and congestive heart failure. CONCLUSION: Hypothermia was associated with increased transfusion requirement in patients undergoing OPCAB who received clopidogrel in proximity to surgery. Considering the high prevalence and the possibility of hypothermia being a modifiable risk factor, aggressive measures should be undertaken to maintain normothermia in those patients.
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T201400667.pdf Download
DOI
10.3349/ymj.2014.55.1.224
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Thoracic and Cardiovascular Surgery (흉부외과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Anesthesiology and Pain Medicine (마취통증의학교실) > 1. Journal Papers
Yonsei Authors
곽영란(Kwak, Young Lan) ORCID logo https://orcid.org/0000-0002-2984-9927
송종욱(Song, Jong Wook) ORCID logo https://orcid.org/0000-0001-7518-2070
심재광(Shim, Jae Kwang) ORCID logo https://orcid.org/0000-0001-9093-9692
유경종(Yoo, Kyung Jong) ORCID logo https://orcid.org/0000-0002-9858-140X
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URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/98315
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